控制基质质量含水率在45%左右的条件下，用幂函数和线性函数预测基质电导率都获得了较高的精度。

When the water mass fraction of the substrate is about 45%, its EC can be predicted accurately by both the power function as well as the linear function models.

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该模型以制造成本与质量损失成本之和为目标函数，以加工能力和功能要求为约束条件。

The object function of the model is the sum of manufacturing cost and quality loss. The machining capability and function requirement were given as the restriction conditions.

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该方法以变精度粗糙集的分类质量的量度作为信息函数，对条件属性进行选择。

The measure of quality ofclassification acts as information function to select the condition attribute in this method.

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